Mold



Dec. 1924- 1,517,918

c. v. PIERSON MOLD Filed Dec, 20, 192

RSO.

Patented Dec. 2, 1924.

UNETED STATES ennie earner @FHQE.

CHARLES V. PIER$O1\T, OF DULUTH, MINNESOTA.

Application filed December 20, 1923. Serial No. 681,745.

To all whom it may concern I Be it known that 1, CHARL S V. PInnsoN, a citizen of the United States, residing at Duluth, in the county of StxLouis and State of Minnesota, have invented certain new and useful Improvements in Molds, of which the following is a specification, reference being had therein. to the accompanying drawing.

This invention relates to molds and has special reference to molds for forming composition units such as concrete blocks, bricks or the like.

The principal object is to produce a mold which may be used in large numbers cooperatively for the economical production of such composition units.

Another object is to produce a novel assembla e of molds whereby to render the separation of the moulded object from the mold as readily and economically as possible.

Other objects and advantages of the invention will appear in the further description thereof.

Referring now to the accompanying drawing forming part of this application in which like reference characters indicate like parts:

Figure 1 is a perspective view illustrating an individually separable assemblage of one form of the improved mold;

Figure 2 is a perspective view of another form of mold in which like results may be accomplished to those shown in Figure 1.

In Figure 1 each mold is preferably made of sheet metal and comprises the Hatbottom 1. upright side 2, and upright end 3. and, as this general form of mold is well known, the novel feature resides in providing one or more upright lugs or guards 4 upon the wall-less sides of the bottom 1. said guards being for the purpose of preventing overlapping engagement of the molds when assembled. By this means the assembling of the molds is greatly simplified and their positive registration assured. It is true that the presence of the lugs 4 results in a slight depression in the corners of the finished product, but this is not of sufficient moment to in any way depreciate the value of the product.

In Figure 2 the mold illustrated is for a modified form of block, and the means for preventing overlapping of these forms comprises the continuous depending flange 5 formed integral with the edge of the up wardly stepped portion 6 of the bottom 7, there being a centrally arched portion 8 intermediate of the two stepped portions of the bottom. The end wall 9 of this mold extends entirely across same and forms the necessary guard in abutting the irregular line of the bottom of the next adjacent mold so that the assembling of the same results in this form of mold being as expeditiously grouped as those shown in Figure 1.

In Figure 3 is illustrated a novel assemblage of angle mold which comprises the secure individual fastening to a board or plank 10 of each mold centrally of the bottom thereof as at 11, the bottom of each mold being illustrated at 12 and the up standing wall at 13. These molds are for forming plain rectangularly shaped bricks or blocks, and narrow metal or wooden strips 14L may be employed at the sides thereof in order to complete the wholly surrounded rectangularly shaped cells or compartments.

The object of fastening each of the molds permanently and on a central line through the bottom thereof to the yielding plank or other suitable yielding member is to permit of the same in its entirety being turned upside-down and the blocks removed therefrom by raising the opposite ends of the plank, the backward spring of which tends to simultaneously free the blocks in that the outer edges of the vertical walls of the molds will be slightly sepa ated.

I am aware that somewhat similar devices have been employed in forming a plurality of blocks on a yielding surface but in which only the upright division walls have been employed thus rendering them much more susceptible to breakage and dislodgmem. from the board, besides the absence of the reinforcement of the integrally formed bottom to each mold, the advantage of uniform ity of material surrounding each compartment, and the dependability of uniformity in shape. It is also apparent that the rigid attachment of the angle blocks closely abutting each other materially stiffens the foundation member against springing when lifted by the ends thereof and carried about.

Obviously, molds such as shown in Figure 2, might be assembled in the same manner as those shown in Figure 3, either with or without the ends 9, and in which event the upright walls 5 are essential as a support for the edge of the stepped portioi 3, the

bottom; While the fastening of the mold to the board Would occur centrally of the portion 7 of the bottom.

Having thus described my invention, What I claim and desire to secure by Letters Patent, is:

1. A block mold of the character described having a bottom and two contiguous sides formed integral therewith, and

1 means for preventing overlapping of the molds when grouped together for forming a pluralit of blocks.

2. The combination With a mold of the type described having a bottom and two vertically disposed contiguous sides, of means formed integral with one side-less edge of the mold to prevent overlapping of the next adjacent mold.

In testimony whereof I hereunto affix my signature in the presence of tWo- Witnesses.

CHARLES V. PIERSON.

Witnesses:

S. C. BRoNsoN, S. G120. STEVENS. 

